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Cathartus quadricollis (Guérin-Méneville, 1844) - (square-necked grain beetle)
This beetle is found in tropical and subtropical regions, as well as in grain stores in temperate areas. It is often less important as a grain pest compared to the more common grain beetles like Cryptolestes ferrugineus or Oryzaephilus surinamensis. C. quadricollis might co-exist in infested grain together with those more common species.
The adult beetle is around 2-3½ long, flat and with a rectangular pronotum. The colouration is light brown.